b := backoff.NewExponentialBackOff(backoff.DefaultOption())
		// context for both timeout and channel, whichever stops first, the context will be done
		ctx, cancel := context.WithCancel(context.Background())
		go func() {
			select {
			case <-ret.stop:
				cancel()
			case <-ctx.Done():
			}
		}()
		defer cancel()
		_ = b.RetryWithContext(ctx, func() error {

			s.timer.sleep(int64(debug.traceadvanceperiod))

			// Try to advance the trace.
			traceAdvance(false)
		}
		s.done <- struct{}{}
	}()
}

// stop stops a traceAdvancer and blocks until it exits.
func (s *traceAdvancerState) stop() {
	s.timer.wake()
	<-s.done
	close(s.done)
	s.timer.close()
}

// traceAdvancePeriod is the approximate period between
// new generations.

					if err != nil {
						failure = true
						decomLogIf(ctx, err)
						stopFn(version.Size, err)
						continue
					}
					if err = z.decommissionObject(ctx, bi.Name, gr); err != nil {
						stopFn(version.Size, err)
						failure = true
						decomLogIf(ctx, err)
						continue
					}
					stopFn(version.Size, nil)
					failure = false
					break
				}
				if ignore {
					continue
				}

		})
	}
}

type timer interface {
	Stop() bool
	Reset(Duration) bool
}

// tickerTimer is a Timer with Reset and Stop methods that return bools,
// to have the same signatures as Timer.
type tickerTimer struct {
	*Ticker
	stopped bool
}

func (t *tickerTimer) Stop() bool {
	pending := !t.stopped
	t.stopped = true
	t.Ticker.Stop()
	return pending
}

  val result = copyOf(size + 1)
  result[result.lastIndex] = value
  return result as Array<String>
}

/** Increments [startIndex] until this string is not ASCII whitespace. Stops at [endIndex]. */
internal fun String.indexOfFirstNonAsciiWhitespace(
  startIndex: Int = 0,
  endIndex: Int = length,
): Int {
  for (i in startIndex until endIndex) {
    when (this[i]) {

						// as we create them only after acquiring the leader lock
						// Note: stop here should be the overall pilot stop, NOT the leader election stop. We are
						// basically lazy loading the informer, if we stop it when we lose the lock we will never
						// recreate it again.
						client.RunAndWait(clusterStopCh)
						nc.Run(leaderStop)
					})

func (c *Controller) AddRegistryAndRun(registry serviceregistry.Instance, stop <-chan struct{}) {
	if stop == nil {
		log.Warnf("nil stop channel passed to AddRegistryAndRun for registry %s/%s", registry.Provider(), registry.Cluster())
	}
	c.storeLock.Lock()
	defer c.storeLock.Unlock()
	c.addRegistry(registry, stop)
	if c.running {
		go registry.Run(stop)
	}
}

			})
			g := NewWithT(t)
			s, err := NewServer(args, func(s *Server) {
				s.kubeClient = kube.NewFakeClient()
			})
			g.Expect(err).To(Succeed())
			stop := make(chan struct{})
			g.Expect(s.Start(stop)).To(Succeed())
			defer func() {
				close(stop)
				s.WaitUntilCompletion()
			}()

			if c.expNewCert {
				if istiodCert, err := s.getIstiodCertificate(nil); istiodCert == nil || err != nil {

	// Implement EnvoyXdsServer grace shutdown
	s.addStartFunc("xds server", func(stop <-chan struct{}) error {
		log.Infof("Starting ADS server")
		s.XDSServer.Start(stop)
		return nil
	})
}

// Wait for the stop, and do cleanups
func (s *Server) waitForShutdown(stop <-chan struct{}) {
	go func() {
		<-stop
		close(s.internalStop)
		_ = s.fileWatcher.Close()

		if s.cacertsWatcher != nil {

			b, err := yaml.JSONToYAML(data)
			if err != nil {
				return err
			}
			writes <- string(b)
		}
		return nil
	}
	stop := test.NewStop(t)
	gws := clienttest.Wrap(t, d.gateways)
	go tw.Run(stop)
	go d.Run(stop)
	c.RunAndWait(stop)
	kube.WaitForCacheSync("test", stop, d.queue.HasSynced)
	// Create a gateway, we should mark our ownership
	defaultGateway := &k8sbeta.Gateway{
		ObjectMeta: metav1.ObjectMeta{